<template>

    <el-container class="home-container">
      <!-- 头部 -->
  <el-header>
   <div>
    <img src="../assets/logo2.png">
    <span>电商后台管理系统</span>
   </div>
    <el-button type="info" @click="logout">退出</el-button>
    </el-header>
  <el-container>
    <!-- 左侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px'" >
  <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff"
      unique-opened
      :collapse="isCollapse"
      :collapse-transition="false"
      router
      :default-active="activePath"
      >

      <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
        <!-- 一级菜单模板 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id"
        @click="saveNaveState('/'+subItem.path)">

          <template slot="title" >
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>

      </el-submenu>

    </el-menu>
    </el-aside>
    <!-- 内容 -->
    <el-main>
      <!-- 主要路由占位符 -->
      <router-view></router-view>
      </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data () {
    return {
      menulist: [],
      iconsObj: {
        125: 'el-icon-user-solid',
        103: 'el-icon-s-promotion',
        101: 'el-icon-s-data',
        102: 'el-icon-upload',
        145: 'el-icon-s-help'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  methods: {
    logout () {
      // 退出先清除电脑是储存token的值
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.Message.error(res.meta.msg)
      this.menulist = res.data
    },
    // 点击按钮切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNaveState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  }

}
</script>

<style lang="less" scoped>
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-left: 0;
  >div{
    display: flex;
    align-items: center;
    font-size: 20px;
    color: #fff;
    img{
      height: 60px;
    }
  }

}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main{
  background-color: #eaedf1;
}
.toggle-button{
  background-color: #4a5064;
  text-align: center;
  line-height:  21px;
  font-size: 10px;
  color: #fff;
  letter-spacing: 0.2em;
  cursor: pointer;

}

</style>
